Event: Division 2

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Opponent Rating Result
Yousaf Ahmed 1450 0 - 1
Chris Stansfield 1416 0 - 1
Donna Chadwick 1187 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1218 = (4053 + 400 * (1 - 2)) / 3)

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